Full Adder Question

Does "255" require eight full adders in a digital circuit? I want to make sure I understand this correctly: A full adder outputs a sum 'plus' a carry bit. The sum could be fed directly to an LED but the carry bit is fed to the next full adder. If I built this circuit is this correct?
Larry

If the grass is greener on the other side...it's time to water your lawn.
545 x 347 - 36K

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